Another site:
AllTop 200 most popular tests to learn English...
1) Test de niveau anglais (webmaster) 6 772 993
2) Placement test : grammar for beginners (lucile83) 5 983 246
3) A/AN (webmaster) 5 359 467
4) Auxiliary BE (webmaster) 3 221 481
5) Present continuous (webmaster) 2 995 649
6) Present simple (webmaster) 2 903 662
7) Present simple (webmaster) 2 594 139
8) Present continuous (webmaster) 2 427 500
9) Adjectives (webmaster) 2 091 780
10) A/an (anonyme) 2 012 141
11) Present perfect simple (webmaster) 1 637 644
12) Preterite (webmaster) 1 619 738
13) Vocabulary - Placement test (bridg) 1 617 839
14) Preterite (webmaster) 1 442 324
15) Short placement test (webmaster) 1 442 115
16) To be (bridg) 1 404 381
17) What time is it? (webmaster) 1 347 540
18) Present perfect (webmaster) 1 341 440
19) The alphabet in English (webmaster) 1 319 392
20) Adjectives (lucile83) 1 214 100
21) What time is it? (webmaster) 1 205 326
22) Numbers (webmaster) 1 187 620
23) 'A' ou 'An' (anonyme) 1 173 004
24) Two presents: present continuous, present simple (webmaster) 1 147 084
25) To be (bridg) 1 144 072
26) Comparatives / Superlatives (webmaster) 1 098 734
27) Numbers (webmaster) 1 069 122
28) CAN / MUST (webmaster) 1 057 432
29) THE/ A / AN / nothing (webmaster) 1 030 661
30) Comparatives (webmaster) 1 006 093
31) Family life (bridg) 999 271
32) Numbers > 100 (webmaster) 985 397
33) Future (going to/will/present continuous) (anonyme) 961 633
34) Plural (webmaster) 954 442
35) Superlatives (webmaster) 873 825
36) Adjectives (anonyme) 873 450
37) Simple present (bridg) 852 444
38) Spelled words N°1 (bridg) 848 845
39) Placement test beginners: Check your spelling (lucile83) 829 530
40) Introducing oneself (webmaster) 826 394
41) Adverbs of frequency (lucile83) 815 202
42) Family (bridg) 783 507
43) General test-End of high school / Beginning of university (webmaster) 781 766
44) Present simple (lucile83) 778 003
45) Frequency adverbs (webmaster) 776 724
46) Present BE + Ving (bridg) 763 552
47) Genitive (webmaster) 722 671
48) Family tree (anonyme) 718 350
49) Preterite: simple or continuous? (webmaster) 715 022
50) Passive form (lucile83) 713 879
51) Placement test (beginners) (lili73) 699 842
52) Past simple or present perfect (lucile83) 691 460
53) Future (webmaster) 675 186
54) 2 Preterites (webmaster) 660 609
55) Present perfect simple (bridg) 657 588
56) Preterite (webmaster) 618 486
57) List of 200 irregular verbs and audio (bridg) 614 816
58) Modals (webmaster) 611 960
59) Spelled words N°2 (bridg) 608 212
60) Height (webmaster) 605 652
61) Modals (webmaster) 603 221
62) Articles a / an / the (lucile83) 596 722
63) Plural forms (bridg) 576 321
64) Nationalities (webmaster) 573 399
65) Past continuous / Past simple (anonyme) 562 521
66) Irregular plurals (bridg) 552 575
67) Two presents: simple and continuous (webmaster) 548 858
68) Preterite (bridg) 547 969
69) Vocabulary: greeting people (here4u) 536 387
70) Superlatives (frapedur) 535 096
71) Give your opinion (bridg) 531 015
72) Adverbs of Frequency (bridg) 516 246
73) Present simple or continuous (lucile83) 508 195
74) Present perfect / preterite ? (anonyme) 506 652
75) Possessive case (anonyme) 479 728
76) Countries & nationalities (bridg) 472 518
77) 'The' or nothing? (webmaster) 470 583
78) Introducing oneself (easy) (webmaster) 470 177
79) Past tenses (bridg) 469 699
80) Passive voice (webmaster) 461 657
81) Present Simple vs. Past Simple (anonyme) 454 932
82) Questions : how to ask them (lucile83) 447 450
83) General Test II / End of high school / Beginning of universi (webmaster) 445 538
84) IN, ON, AT or TO? (webmaster) 444 227
85) Relative pronouns (webmaster) 443 233
86) Comparative of superiority (lucile83) 436 852
87) How to pronounce the final -ED? (past simple) (webmaster) 436 064
88) Relative clauses (webmaster) 422 505
89) Sounds: [h] (webmaster) 419 004
90) Comparative (anonyme) 412 088
91) A/an/Ø (bridg) 397 646
92) Future simple (lucile83) 395 026
93) Past simple (anonyme) 393 267
94) This / That / These / Those (webmaster) 391 946
95) Conditional (webmaster) 390 854
96) Passive voice (anonyme) 389 536
97) Comparing (webmaster) 387 550
98) Can / could/ may/ might (woodyrun) 378 664
99) Present perfect or past tense (anonyme) 375 899
100) Much, many, little and few (felin) 371 212
101) Personal pronouns (anonyme) 371 058
102) Some, any, no, enough, too/too much/too many (webmaster) 367 706
103) Preterite continuous (BE + -ING) (webmaster) 367 662
104) Genitive case (bridg) 367 109
105) Confusing words - Placement test (bridg) 364 310
106) Irregular verbs (webmaster) 362 834
107) Numbers from 1 to 10 (lucile83) 361 010
108) Past perfect simple, past perfect continuous (anonyme) 360 592
109) Present continuous or present simple (webmaster) 359 118
110) Present perfect or preterite? (anonyme) 355 088
111) Simple Past : regular verbs (anonyme) 351 789
112) Comparative Adjectives (bridg) 351 753
113) Who, Whom, Which, or Whose? (anonyme) 348 058
114) Past simple (video) (lucile83) 347 120
115) Past simple or past continuous (lucile83) 340 011
116) What time is it? (webmaster) 337 118
117) While / When (anonyme) 337 047
118) Modals (tinou) 336 011
119) Modal: may/might (lucile83) 333 720
120) Cardinal and ordinal numbers (anonyme) 328 128
121) Possessive adjectives and pronouns (woodyrun) 323 517
122) The superlative (anonyme) 323 156
123) How to talk about the weather (lili73) 320 833
124) Since and for (lucile83) 318 020
125) Flags (webmaster) 317 033
126) Irregular verbs (bridg) 315 406
127) Prepositions - in, on, at (anonyme) 313 772
128) Pronouns (woodyrun) 312 225
129) Tenses (anonyme) 311 023
130) Placement test 3 (webmaster) 309 986
131) Order of adjectives (webmaster) 306 092
132) Could/Couldn't (laure95) 305 446
133) Comparative (anonyme) 303 939
134) Adjectives and prepositions (lucile83) 303 781
135) Agreement Tags (webmaster) 303 577
136) Asking questions (webmaster) 302 647
137) Present perfect OR simple past? (bridg) 297 947
138) Questions in the past tense (lucile83) 296 970
139) Superlative Adjectives (bridg) 295 158
140) Uncountable nouns (webmaster) 295 060
141) Object pronouns (bridg) 293 842
142) Placement test 1 (lucile83) 292 224
143) Present simple (lucile83) 289 963
144) Prefer/rather (bridg) 288 760
145) Passive form (anonyme) 288 607
146) Can/Must/Should (laure95) 288 447
147) Must or Have to? (woodyrun) 286 450
148) Past perfect (lili73) 285 763
149) The/an/nothing (bridg) 284 632
150) To be (anonyme) 283 159
151) Vocabulary: asking and answering (here4u) 280 397
152) Can and can't (laure95) 279 424
153) Modal verbs (bridg) 276 917
154) Some / Any / no... (bridg) 269 892
155) Days of the week (bridg) 268 968
156) So / neither (anonyme) 264 041
157) Past simple (video) (lucile83) 263 272
158) Used to (bridg) 260 090
159) Should / must (anonyme) 258 954
160) Past tense (anonyme) 258 847
161) Vocabulary: on the phone (here4u) 258 663
162) Find out a quantity (webmaster) 258 366
163) Present continuous (chnawa) 257 824
164) Superlative + and adjective (lucile83) 256 668
165) Articles : a / an / the / Ø (anonyme) 254 953
166) Comparative and superlative (anonyme) 253 715
167) Numbers 1/100 (anonyme) 253 101
168) Modal can (video) (lucile83) 252 521
169) Relatives pronouns (who, which, that...) (anonyme) 247 772
170) Vocabulary: at the restaurant (here4u) 245 601
171) A few, a little, few, little (anonyme) 244 647
172) Comparatives (anonyme) 244 177
173) Would rather / would prefer to (anonyme) 243 960
174) Present continuous and the Going to form (anonyme) 242 178
175) Have something done (anonyme) 239 503
176) Should/ have to/ must (anonyme) 238 939
177) The past (webmaster) 237 599
178) Future continuous and future perfect. (felin) 237 284
179) Used to/would (woodyrun) 236 779
180) How to ask a question in English (bridg) 234 760
181) I wish, if only (felin) 233 815
182) Pluperfect (webmaster) 233 539
183) Countable or Uncountable? (webmaster) 232 764
184) Some / any (younes91) 231 314
185) Should / shouldn't (anonyme) 230 959
186) Present simple or continuous (bridg) 230 760
187) Adjectives - ing and ed (felin) 228 458
188) Hypothesis (webmaster) 227 657
189) Auxiliary BE (lucile83) 226 114
190) Articles a/an/the/0 (bridg) 225 918
191) Article The or nothing (anonyme) 225 538
192) Present perfect with Ever - never - (anonyme) 225 192
193) Present continuous OR Present simple? (bridg) 225 036
194) Must or mustn't (laure95) 224 231
195) Simple Preterite OR Preterite (BE+ing) (webmaster) 222 533
196) To / in order to / so as to / so that (irish21) 219 336
197) Present perfect (bridg) 219 117
198) What time is it ? (anonyme) 217 336
199) Comparison (komiks) 216 500
200) Indirect speech (bridg) 215 727
