Another site:
AllTop 200 most popular tests to learn English...
1) Test de niveau anglais (webmaster) 6 784 861
2) Placement test : grammar for beginners (anonyme) 6 003 911
3) A/AN (webmaster) 5 372 472
4) Auxiliary BE (webmaster) 3 227 756
5) Present continuous (webmaster) 3 003 997
6) Present simple (webmaster) 2 927 941
7) Present simple (webmaster) 2 601 788
8) Present continuous (webmaster) 2 442 074
9) Adjectives (webmaster) 2 095 805
10) A/an (anonyme) 2 019 510
11) Present perfect simple (webmaster) 1 651 743
12) Preterite (webmaster) 1 638 412
13) Vocabulary - Placement test (bridg) 1 621 244
14) Preterite (webmaster) 1 453 814
15) Short placement test (webmaster) 1 445 351
16) To be (bridg) 1 408 554
17) Present perfect (webmaster) 1 353 007
18) What time is it? (webmaster) 1 351 570
19) The alphabet in English (webmaster) 1 323 199
20) Adjectives (anonyme) 1 218 130
21) What time is it? (webmaster) 1 212 267
22) Numbers (webmaster) 1 189 844
23) 'A' ou 'An' (anonyme) 1 178 603
24) Two presents: present continuous, present simple (webmaster) 1 152 130
25) To be (bridg) 1 147 452
26) Comparatives / Superlatives (webmaster) 1 111 721
27) Numbers (webmaster) 1 072 755
28) CAN / MUST (webmaster) 1 060 189
29) THE/ A / AN / nothing (webmaster) 1 037 046
30) Comparatives (webmaster) 1 008 700
31) Family life (bridg) 1 002 663
32) Numbers > 100 (webmaster) 987 808
33) Future (going to/will/present continuous) (anonyme) 967 145
34) Plural (webmaster) 957 470
35) Superlatives (webmaster) 876 871
36) Adjectives (anonyme) 876 351
37) Simple present (bridg) 855 881
38) Spelled words N°1 (bridg) 851 818
39) Placement test beginners: Check your spelling (anonyme) 831 028
40) Introducing oneself (webmaster) 828 240
41) Adverbs of frequency (anonyme) 819 979
42) Family (bridg) 786 230
43) Present simple (anonyme) 784 387
44) General test-End of high school / Beginning of university (webmaster) 784 301
45) Frequency adverbs (webmaster) 779 129
46) Present BE + Ving (bridg) 767 452
47) Passive form (anonyme) 733 337
48) Genitive (webmaster) 724 740
49) Family tree (anonyme) 720 662
50) Preterite: simple or continuous? (webmaster) 718 844
51) Placement test (beginners) (lili73) 703 104
52) Past simple or present perfect (anonyme) 698 193
53) Future (webmaster) 676 958
54) Present perfect simple (bridg) 665 665
55) 2 Preterites (webmaster) 664 301
56) Preterite (webmaster) 623 194
57) List of 200 irregular verbs and audio (bridg) 617 913
58) Modals (webmaster) 613 710
59) Spelled words N°2 (bridg) 610 455
60) Modals (webmaster) 608 988
61) Height (webmaster) 607 152
62) Articles a / an / the (anonyme) 596 783
63) Plural forms (bridg) 578 976
64) Nationalities (webmaster) 575 349
65) Past continuous / Past simple (anonyme) 570 454
66) Irregular plurals (bridg) 554 999
67) Two presents: simple and continuous (webmaster) 550 777
68) Preterite (bridg) 550 421
69) Superlatives (frapedur) 542 924
70) Vocabulary: greeting people (here4u) 536 614
71) Give your opinion (bridg) 533 153
72) Adverbs of Frequency (bridg) 517 999
73) Present simple or continuous (anonyme) 513 982
74) Present perfect / preterite ? (anonyme) 513 243
75) Possessive case (anonyme) 481 625
76) Countries & nationalities (bridg) 474 651
77) Past tenses (bridg) 472 556
78) 'The' or nothing? (webmaster) 472 007
79) Introducing oneself (easy) (webmaster) 471 452
80) Passive voice (webmaster) 465 344
81) Present Simple vs. Past Simple (anonyme) 461 061
82) Questions : how to ask them (anonyme) 449 333
83) General Test II / End of high school / Beginning of universi (webmaster) 447 044
84) IN, ON, AT or TO? (webmaster) 446 717
85) Relative pronouns (webmaster) 446 452
86) Comparative of superiority (anonyme) 441 003
87) How to pronounce the final -ED? (past simple) (webmaster) 439 848
88) Relative clauses (webmaster) 424 399
89) Sounds: [h] (webmaster) 420 131
90) Comparative (anonyme) 415 654
91) Past simple (anonyme) 401 477
92) A/an/Ø (bridg) 399 969
93) Future simple (anonyme) 398 031
94) This / That / These / Those (webmaster) 393 321
95) Conditional (webmaster) 392 986
96) Passive voice (anonyme) 392 134
97) Comparing (webmaster) 388 700
98) Can / could/ may/ might (woodyrun) 380 997
99) Present perfect or past tense (anonyme) 379 558
100) Much, many, little and few (felin) 375 179
101) Personal pronouns (anonyme) 371 760
102) Preterite continuous (BE + -ING) (webmaster) 371 430
103) Genitive case (bridg) 369 188
104) Some, any, no, enough, too/too much/too many (webmaster) 368 815
105) Confusing words - Placement test (bridg) 365 029
106) Irregular verbs (webmaster) 364 738
107) Numbers from 1 to 10 (anonyme) 362 153
108) Past perfect simple, past perfect continuous (anonyme) 361 310
109) Present continuous or present simple (webmaster) 360 214
110) Present perfect or preterite? (anonyme) 359 362
111) Simple Past : regular verbs (anonyme) 355 194
112) Comparative Adjectives (bridg) 352 838
113) Who, Whom, Which, or Whose? (anonyme) 350 092
114) Past simple (video) (anonyme) 349 719
115) Past simple or past continuous (anonyme) 346 121
116) While / When (anonyme) 341 184
117) What time is it? (webmaster) 338 817
118) Modals (tinou) 337 320
119) Modal: may/might (anonyme) 334 834
120) Cardinal and ordinal numbers (anonyme) 329 379
121) The superlative (anonyme) 328 006
122) Possessive adjectives and pronouns (woodyrun) 325 092
123) How to talk about the weather (lili73) 320 983
124) Since and for (anonyme) 319 947
125) Flags (webmaster) 318 202
126) Irregular verbs (bridg) 316 854
127) Pronouns (woodyrun) 315 625
128) Prepositions - in, on, at (anonyme) 314 645
129) Tenses (anonyme) 313 179
130) Placement test 3 (webmaster) 311 037
131) Order of adjectives (webmaster) 307 187
132) Could/Couldn't (laure95) 306 858
133) Comparative (anonyme) 305 425
134) Adjectives and prepositions (anonyme) 304 626
135) Agreement Tags (webmaster) 304 608
136) Asking questions (webmaster) 303 759
137) Present perfect OR simple past? (bridg) 298 933
138) Questions in the past tense (anonyme) 298 635
139) Uncountable nouns (webmaster) 296 636
140) Superlative Adjectives (bridg) 296 569
141) Object pronouns (bridg) 296 417
142) Passive form (anonyme) 294 482
143) Placement test 1 (anonyme) 293 504
144) Present simple (anonyme) 292 310
145) Can/Must/Should (laure95) 291 763
146) Past perfect (lili73) 291 117
147) Prefer/rather (bridg) 290 244
148) Must or Have to? (woodyrun) 288 757
149) The/an/nothing (bridg) 285 944
150) To be (anonyme) 283 675
151) Can and can't (laure95) 283 283
152) Vocabulary: asking and answering (here4u) 280 505
153) Modal verbs (bridg) 277 760
154) Some / Any / no... (bridg) 275 329
155) Days of the week (bridg) 269 230
156) So / neither (anonyme) 264 655
157) Past simple (video) (anonyme) 264 249
158) Present continuous (chnawa) 262 451
159) Used to (bridg) 260 624
160) Should / must (anonyme) 260 539
161) Past tense (anonyme) 259 841
162) Articles : a / an / the / Ø (anonyme) 258 893
163) Vocabulary: on the phone (here4u) 258 861
164) Find out a quantity (webmaster) 258 805
165) Superlative + and adjective (anonyme) 257 951
166) Comparative and superlative (anonyme) 257 678
167) Numbers 1/100 (anonyme) 254 046
168) Modal can (video) (anonyme) 253 473
169) Comparatives (anonyme) 251 673
170) Relatives pronouns (who, which, that...) (anonyme) 247 901
171) A few, a little, few, little (anonyme) 246 516
172) Vocabulary: at the restaurant (here4u) 245 718
173) Would rather / would prefer to (anonyme) 245 019
174) Present continuous and the Going to form (anonyme) 243 351
175) Should/ have to/ must (anonyme) 241 339
176) Have something done (anonyme) 240 186
177) Used to/would (woodyrun) 238 484
178) Future continuous and future perfect. (felin) 238 077
179) The past (webmaster) 238 076
180) How to ask a question in English (bridg) 236 304
181) Pluperfect (webmaster) 234 597
182) I wish, if only (felin) 234 457
183) Some / any (younes91) 234 377
184) Countable or Uncountable? (webmaster) 233 958
185) Should / shouldn't (anonyme) 232 179
186) Present simple or continuous (bridg) 230 840
187) Adjectives - ing and ed (felin) 229 725
188) Hypothesis (webmaster) 228 772
189) Must or mustn't (laure95) 227 143
190) Auxiliary BE (anonyme) 226 686
191) Articles a/an/the/0 (bridg) 226 490
192) Article The or nothing (anonyme) 226 361
193) Present perfect with Ever - never - (anonyme) 226 220
194) Present continuous OR Present simple? (bridg) 225 808
195) Simple Preterite OR Preterite (BE+ing) (webmaster) 223 203
196) Comparison (komiks) 221 596
197) To / in order to / so as to / so that (irish21) 221 281
198) Present perfect (bridg) 219 867
199) Indirect speech (bridg) 218 167
200) What time is it ? (anonyme) 217 974
