Another site:
AllTop 200 most popular tests to learn English...
1) Test de niveau anglais (webmaster) 6 774 696
2) Placement test : grammar for beginners (lucile83) 5 985 713
3) A/AN (webmaster) 5 361 293
4) Auxiliary BE (webmaster) 3 222 364
5) Present continuous (webmaster) 2 996 772
6) Present simple (webmaster) 2 906 642
7) Present simple (webmaster) 2 595 145
8) Present continuous (webmaster) 2 429 302
9) Adjectives (webmaster) 2 092 412
10) A/an (anonyme) 2 013 170
11) Present perfect simple (webmaster) 1 638 946
12) Preterite (webmaster) 1 621 752
13) Vocabulary - Placement test (bridg) 1 618 255
14) Preterite (webmaster) 1 443 712
15) Short placement test (webmaster) 1 442 621
16) To be (bridg) 1 405 014
17) What time is it? (webmaster) 1 348 003
18) Present perfect (webmaster) 1 342 632
19) The alphabet in English (webmaster) 1 319 953
20) Adjectives (lucile83) 1 214 771
21) What time is it? (webmaster) 1 205 953
22) Numbers (webmaster) 1 187 932
23) 'A' ou 'An' (anonyme) 1 173 802
24) Two presents: present continuous, present simple (webmaster) 1 147 936
25) To be (bridg) 1 144 587
26) Comparatives / Superlatives (webmaster) 1 099 946
27) Numbers (webmaster) 1 069 649
28) CAN / MUST (webmaster) 1 057 749
29) THE/ A / AN / nothing (webmaster) 1 031 505
30) Comparatives (webmaster) 1 006 415
31) Family life (bridg) 999 800
32) Numbers > 100 (webmaster) 985 721
33) Future (going to/will/present continuous) (anonyme) 962 035
34) Plural (webmaster) 954 938
35) Superlatives (webmaster) 874 144
36) Adjectives (anonyme) 873 954
37) Simple present (bridg) 852 873
38) Spelled words N°1 (bridg) 849 334
39) Placement test beginners: Check your spelling (lucile83) 829 699
40) Introducing oneself (webmaster) 826 674
41) Adverbs of frequency (lucile83) 815 796
42) Family (bridg) 783 902
43) General test-End of high school / Beginning of university (webmaster) 782 060
44) Present simple (lucile83) 778 594
45) Frequency adverbs (webmaster) 777 107
46) Present BE + Ving (bridg) 763 979
47) Genitive (webmaster) 722 940
48) Family tree (anonyme) 718 754
49) Passive form (lucile83) 715 658
50) Preterite: simple or continuous? (webmaster) 715 411
51) Placement test (beginners) (lili73) 700 188
52) Past simple or present perfect (lucile83) 692 169
53) Future (webmaster) 675 365
54) 2 Preterites (webmaster) 660 960
55) Present perfect simple (bridg) 658 400
56) Preterite (webmaster) 619 103
57) List of 200 irregular verbs and audio (bridg) 615 228
58) Modals (webmaster) 612 182
59) Spelled words N°2 (bridg) 608 563
60) Height (webmaster) 605 908
61) Modals (webmaster) 603 833
62) Articles a / an / the (lucile83) 596 730
63) Plural forms (bridg) 576 729
64) Nationalities (webmaster) 573 716
65) Past continuous / Past simple (anonyme) 563 871
66) Irregular plurals (bridg) 552 946
67) Two presents: simple and continuous (webmaster) 549 027
68) Preterite (bridg) 548 256
69) Vocabulary: greeting people (here4u) 536 425
70) Superlatives (frapedur) 535 971
71) Give your opinion (bridg) 531 351
72) Adverbs of Frequency (bridg) 516 481
73) Present simple or continuous (lucile83) 508 985
74) Present perfect / preterite ? (anonyme) 507 296
75) Possessive case (anonyme) 480 066
76) Countries & nationalities (bridg) 472 820
77) 'The' or nothing? (webmaster) 470 830
78) Introducing oneself (easy) (webmaster) 470 354
79) Past tenses (bridg) 469 983
80) Passive voice (webmaster) 462 020
81) Present Simple vs. Past Simple (anonyme) 455 500
82) Questions : how to ask them (lucile83) 447 660
83) General Test II / End of high school / Beginning of universi (webmaster) 445 709
84) IN, ON, AT or TO? (webmaster) 444 452
85) Relative pronouns (webmaster) 443 537
86) Comparative of superiority (lucile83) 437 119
87) How to pronounce the final -ED? (past simple) (webmaster) 436 398
88) Relative clauses (webmaster) 422 698
89) Sounds: [h] (webmaster) 419 177
90) Comparative (anonyme) 412 446
91) A/an/Ø (bridg) 397 924
92) Future simple (lucile83) 395 367
93) Past simple (anonyme) 394 550
94) This / That / These / Those (webmaster) 392 141
95) Conditional (webmaster) 391 064
96) Passive voice (anonyme) 389 772
97) Comparing (webmaster) 387 689
98) Can / could/ may/ might (woodyrun) 378 874
99) Present perfect or past tense (anonyme) 376 229
100) Much, many, little and few (felin) 371 570
101) Personal pronouns (anonyme) 371 110
102) Preterite continuous (BE + -ING) (webmaster) 368 004
103) Some, any, no, enough, too/too much/too many (webmaster) 367 807
104) Genitive case (bridg) 367 360
105) Confusing words - Placement test (bridg) 364 361
106) Irregular verbs (webmaster) 363 037
107) Numbers from 1 to 10 (lucile83) 361 191
108) Past perfect simple, past perfect continuous (anonyme) 360 674
109) Present continuous or present simple (webmaster) 359 267
110) Present perfect or preterite? (anonyme) 355 619
111) Simple Past : regular verbs (anonyme) 352 021
112) Comparative Adjectives (bridg) 351 885
113) Who, Whom, Which, or Whose? (anonyme) 348 239
114) Past simple (video) (lucile83) 347 409
115) Past simple or past continuous (lucile83) 340 592
116) While / When (anonyme) 337 621
117) What time is it? (webmaster) 337 322
118) Modals (tinou) 336 185
119) Modal: may/might (lucile83) 333 851
120) Cardinal and ordinal numbers (anonyme) 328 368
121) Possessive adjectives and pronouns (woodyrun) 323 722
122) The superlative (anonyme) 323 598
123) How to talk about the weather (lili73) 320 845
124) Since and for (lucile83) 318 146
125) Flags (webmaster) 317 215
126) Irregular verbs (bridg) 315 559
127) Prepositions - in, on, at (anonyme) 313 825
128) Pronouns (woodyrun) 312 555
129) Tenses (anonyme) 311 261
130) Placement test 3 (webmaster) 310 087
131) Order of adjectives (webmaster) 306 253
132) Could/Couldn't (laure95) 305 546
133) Comparative (anonyme) 304 071
134) Adjectives and prepositions (lucile83) 303 834
135) Agreement Tags (webmaster) 303 738
136) Asking questions (webmaster) 302 790
137) Present perfect OR simple past? (bridg) 298 059
138) Questions in the past tense (lucile83) 297 078
139) Superlative Adjectives (bridg) 295 351
140) Uncountable nouns (webmaster) 295 218
141) Object pronouns (bridg) 294 072
142) Placement test 1 (lucile83) 292 375
143) Present simple (lucile83) 290 339
144) Passive form (anonyme) 289 097
145) Prefer/rather (bridg) 288 954
146) Can/Must/Should (laure95) 288 558
147) Must or Have to? (woodyrun) 286 618
148) Past perfect (lili73) 286 386
149) The/an/nothing (bridg) 284 784
150) To be (anonyme) 283 260
151) Vocabulary: asking and answering (here4u) 280 413
152) Can and can't (laure95) 279 742
153) Modal verbs (bridg) 277 010
154) Some / Any / no... (bridg) 270 012
155) Days of the week (bridg) 269 014
156) So / neither (anonyme) 264 108
157) Past simple (video) (lucile83) 263 407
158) Used to (bridg) 260 188
159) Should / must (anonyme) 259 083
160) Past tense (anonyme) 258 989
161) Vocabulary: on the phone (here4u) 258 682
162) Present continuous (chnawa) 258 552
163) Find out a quantity (webmaster) 258 401
164) Superlative + and adjective (lucile83) 256 810
165) Articles : a / an / the / Ø (anonyme) 255 376
166) Comparative and superlative (anonyme) 254 063
167) Numbers 1/100 (anonyme) 253 237
168) Modal can (video) (lucile83) 252 623
169) Relatives pronouns (who, which, that...) (anonyme) 247 785
170) Vocabulary: at the restaurant (here4u) 245 626
171) Comparatives (anonyme) 245 201
172) A few, a little, few, little (anonyme) 244 801
173) Would rather / would prefer to (anonyme) 244 045
174) Present continuous and the Going to form (anonyme) 242 262
175) Have something done (anonyme) 239 559
176) Should/ have to/ must (anonyme) 239 177
177) The past (webmaster) 237 664
178) Future continuous and future perfect. (felin) 237 359
179) Used to/would (woodyrun) 236 970
180) How to ask a question in English (bridg) 234 909
181) I wish, if only (felin) 233 882
182) Pluperfect (webmaster) 233 608
183) Countable or Uncountable? (webmaster) 232 861
184) Some / any (younes91) 231 704
185) Should / shouldn't (anonyme) 231 052
186) Present simple or continuous (bridg) 230 764
187) Adjectives - ing and ed (felin) 228 593
188) Hypothesis (webmaster) 227 787
189) Auxiliary BE (lucile83) 226 196
190) Articles a/an/the/0 (bridg) 225 978
191) Article The or nothing (anonyme) 225 649
192) Present perfect with Ever - never - (anonyme) 225 268
193) Present continuous OR Present simple? (bridg) 225 137
194) Must or mustn't (laure95) 224 437
195) Simple Preterite OR Preterite (BE+ing) (webmaster) 222 622
196) To / in order to / so as to / so that (irish21) 219 544
197) Present perfect (bridg) 219 210
198) What time is it ? (anonyme) 217 393
199) Comparison (komiks) 216 910
200) Indirect speech (bridg) 215 881
